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    <script>
        // 数组转换为字符串
        // 1. toString（） 将我们的数组转换为字符串
        var arr = [1,2,3];
        console.log(arr.toString()); // 1,2,3
        // 2. join(分隔符)
        var arr1 = ['red','blue','pink'];
        console.log(arr1.join()); //red,blue,pink
        console.log(arr1.join('-')); //red-blue-pink
    </script>
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